summaryrefslogtreecommitdiff
path: root/src/d_iwad.c
blob: 0e48420d11d0e2cc7f772b46bfb4c27290464d09 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
// Emacs style mode select   -*- C++ -*- 
//-----------------------------------------------------------------------------
//
// Copyright(C) 2006 Simon Howard
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
// DESCRIPTION:
//     Search for and locate an IWAD file, and initialize according
//     to the IWAD type.
//
//-----------------------------------------------------------------------------

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>

#include "deh_main.h"
#include "doomdef.h"
#include "doomstat.h"
#include "i_system.h"
#include "m_argv.h"
#include "m_config.h"
#include "m_misc.h"
#include "w_wad.h"
#include "z_zone.h"

// Array of locations to search for IWAD files
//
// "128 IWAD search directories should be enough for anybody".

#define MAX_IWAD_DIRS 128

static boolean iwad_dirs_built = false;
static char *iwad_dirs[MAX_IWAD_DIRS];
static int num_iwad_dirs = 0;

static void AddIWADDir(char *dir)
{
    if (num_iwad_dirs < MAX_IWAD_DIRS)
    {
        iwad_dirs[num_iwad_dirs] = dir;
        ++num_iwad_dirs;
    }
}

// This is Windows-specific code that automatically finds the location
// of installed IWAD files.  The registry is inspected to find special
// keys installed by the Windows installers for various CD versions
// of Doom.  From these keys we can deduce where to find an IWAD.

#if defined(_WIN32) && !defined(_WIN32_WCE)

#define WIN32_LEAN_AND_MEAN
#include <windows.h>

typedef struct 
{
    HKEY root;
    char *path;
    char *value;
} registry_value_t;

#define UNINSTALLER_STRING "\\uninstl.exe /S "

// Keys installed by the various CD editions.  These are actually the 
// commands to invoke the uninstaller and look like this:
//
// C:\Program Files\Path\uninstl.exe /S C:\Program Files\Path
//
// With some munging we can find where Doom was installed.

static registry_value_t uninstall_values[] = 
{
    // Ultimate Doom, CD version (Depths of Doom trilogy)

    {
        HKEY_LOCAL_MACHINE, 
        "Software\\Microsoft\\Windows\\CurrentVersion\\"
            "Uninstall\\Ultimate Doom for Windows 95",
        "UninstallString",
    },

    // Doom II, CD version (Depths of Doom trilogy)

    {
        HKEY_LOCAL_MACHINE, 
        "Software\\Microsoft\\Windows\\CurrentVersion\\"
            "Uninstall\\Doom II for Windows 95",
        "UninstallString",
    },

    // Final Doom

    {
        HKEY_LOCAL_MACHINE, 
        "Software\\Microsoft\\Windows\\CurrentVersion\\"
            "Uninstall\\Final Doom for Windows 95",
        "UninstallString",
    },

    // Shareware version

    {
        HKEY_LOCAL_MACHINE, 
        "Software\\Microsoft\\Windows\\CurrentVersion\\"
            "Uninstall\\Doom Shareware for Windows 95",
        "UninstallString",
    },
};

// Value installed by the Collector's Edition when it is installed

static registry_value_t collectors_edition_value =
{
    HKEY_LOCAL_MACHINE,
    "Software\\Activision\\DOOM Collector's Edition\\v1.0",
    "INSTALLPATH",
};

// Subdirectories of the above install path, where IWADs are installed.

static char *collectors_edition_subdirs[] = 
{
    "Doom2",
    "Final Doom",
    "Ultimate Doom",
};

// Location where Steam is installed

static registry_value_t steam_install_location =
{
    HKEY_LOCAL_MACHINE,
    "Software\\Valve\\Steam",
    "InstallPath",
};

// Subdirs of the steam install directory where IWADs are found

static char *steam_install_subdirs[] =
{
    "steamapps\\common\\doom 2\\base",
    "steamapps\\common\\final doom\\base",
    "steamapps\\common\\ultimate doom\\base",
};

static char *GetRegistryString(registry_value_t *reg_val)
{
    HKEY key;
    DWORD len;
    DWORD valtype;
    char *result;

    // Open the key (directory where the value is stored)

    if (RegOpenKeyEx(reg_val->root, reg_val->path, 0, KEY_READ, &key) 
          != ERROR_SUCCESS)
    {
        return NULL;
    }

    // Find the type and length of the string

    if (RegQueryValueEx(key, reg_val->value, NULL, &valtype, NULL, &len) 
          != ERROR_SUCCESS)
    {
        return NULL;
    }

    // Only accept strings

    if (valtype != REG_SZ)
    {
        return NULL;
    }

    // Allocate a buffer for the value and read the value

    result = malloc(len);

    if (RegQueryValueEx(key, reg_val->value, NULL, &valtype, (unsigned char *) result, &len) 
          != ERROR_SUCCESS)
    {
        free(result);
        return NULL;
    }

    // Close the key
        
    RegCloseKey(key);

    return result;
}

// Check for the uninstall strings from the CD versions

static void CheckUninstallStrings(void)
{
    unsigned int i;

    for (i=0; i<arrlen(uninstall_values); ++i)
    {
        char *val;
        char *path;
        char *unstr;

        val = GetRegistryString(&uninstall_values[i]);

        if (val == NULL)
        {
            continue;
        }

        unstr = strstr(val, UNINSTALLER_STRING);

        if (unstr == NULL)
        {
            free(val);
        }
        else
        {
            path = unstr + strlen(UNINSTALLER_STRING);

            AddIWADDir(path);
        }
    }
}

// Check for Doom: Collector's Edition

static void CheckCollectorsEdition(void)
{
    char *install_path;
    char *subpath;
    unsigned int i;

    install_path = GetRegistryString(&collectors_edition_value);

    if (install_path == NULL)
    {
        return;
    }

    for (i=0; i<arrlen(collectors_edition_subdirs); ++i)
    {
        subpath = malloc(strlen(install_path)
                         + strlen(collectors_edition_subdirs[i])
                         + 5);

        sprintf(subpath, "%s\\%s", install_path, collectors_edition_subdirs[i]);

        AddIWADDir(subpath);
    }

    free(install_path);
}


// Check for Doom downloaded via Steam

static void CheckSteamEdition(void)
{
    char *install_path;
    char *subpath;
    size_t i;

    install_path = GetRegistryString(&steam_install_location);

    if (install_path == NULL)
    {
        return;
    }

    for (i=0; i<arrlen(steam_install_subdirs); ++i)
    {
        subpath = malloc(strlen(install_path) 
                         + strlen(steam_install_subdirs[i]) + 5);

        sprintf(subpath, "%s\\%s", install_path, steam_install_subdirs[i]);

        AddIWADDir(subpath);
    }
}

// Default install directories for DOS Doom

static void CheckDOSDefaults(void)
{
    // These are the default install directories used by the deice
    // installer program:

    AddIWADDir("\\doom2");              // Doom II
    AddIWADDir("\\plutonia");           // Final Doom
    AddIWADDir("\\tnt");
    AddIWADDir("\\doom_se");            // Ultimate Doom
    AddIWADDir("\\doom");               // Shareware / Registered Doom
    AddIWADDir("\\dooms");              // Shareware versions
    AddIWADDir("\\doomsw");
}

#endif

static struct 
{
    char *name;
    GameMission_t mission;
} iwads[] = {
    {"doom2.wad",    doom2},
    {"plutonia.wad", pack_plut},
    {"tnt.wad",      pack_tnt},
    {"doom.wad",     doom},
    {"doom1.wad",    doom},
    {"chex.wad",     doom},
};
            
// Hack for chex quest mode

static void CheckChex(char *iwad_name)
{
    if (!strcmp(iwad_name, "chex.wad")) 
    {
        gameversion = exe_chex;
    }
}

// Search a directory to try to find an IWAD
// Returns the location of the IWAD if found, otherwise NULL.

static char *SearchDirectoryForIWAD(char *dir)
{
    size_t i;

    for (i=0; i<arrlen(iwads); ++i) 
    {
        char *filename; 
        char *iwadname;

        iwadname = DEH_String(iwads[i].name);
        
        filename = malloc(strlen(dir) + strlen(iwadname) + 3);

        if (!strcmp(dir, "."))
        {
            strcpy(filename, iwadname);
        }
        else
        {
            sprintf(filename, "%s%c%s", dir, DIR_SEPARATOR, iwadname);
        }

        if (M_FileExists(filename))
        {
            CheckChex(iwads[i].name);
            gamemission = iwads[i].mission;

            return filename;
        }

        free(filename);
    }

    return NULL;
}

// When given an IWAD with the '-iwad' parameter,
// attempt to identify it by its name.

static void IdentifyIWADByName(char *name)
{
    size_t i;

    gamemission = none;
    
    for (i=0; i<arrlen(iwads); ++i)
    {
        char *iwadname;

        iwadname = DEH_String(iwads[i].name);

        if (strlen(name) < strlen(iwadname))
            continue;

        // Check if it ends in this IWAD name.

        if (!strcasecmp(name + strlen(name) - strlen(iwadname), 
                        iwadname))
        {
            CheckChex(iwads[i].name);
            gamemission = iwads[i].mission;
            break;
        }
    }
}

//
// Add directories from the list in the DOOMWADPATH environment variable.
// 

static void AddDoomWadPath(void)
{
    char *doomwadpath;
    char *p;

    // Check the DOOMWADPATH environment variable.

    doomwadpath = getenv("DOOMWADPATH");

    if (doomwadpath == NULL)
    {
        return;
    }

    doomwadpath = strdup(doomwadpath);

    // Add the initial directory

    AddIWADDir(doomwadpath);

    // Split into individual dirs within the list.

    p = doomwadpath;

    for (;;)
    {
        p = strchr(p, PATH_SEPARATOR);

        if (p != NULL)
        {
            // Break at the separator and store the right hand side
            // as another iwad dir
  
            *p = '\0';
            p += 1;

            AddIWADDir(p);
        }
        else
        {
            break;
        }
    }
}


//
// Build a list of IWAD files
//

static void BuildIWADDirList(void)
{
    char *doomwaddir;

    if (iwad_dirs_built)
    {
        return;
    }

    // Look in the current directory.  Doom always does this.

    AddIWADDir(".");

    // Add DOOMWADDIR if it is in the environment

    doomwaddir = getenv("DOOMWADDIR");

    if (doomwaddir != NULL)
    {
        AddIWADDir(doomwaddir);
    }        

    // Add dirs from DOOMWADPATH

    AddDoomWadPath();

#if defined(_WIN32_WCE)

    // Windows CE locations:

    AddIWADDir("\\Storage Card");
    AddIWADDir(getenv("HOME"));

#elif defined(_WIN32) 

    // Search the registry and find where IWADs have been installed.

    CheckUninstallStrings();
    CheckCollectorsEdition();
    CheckSteamEdition();
    CheckDOSDefaults();

#else

    // Standard places where IWAD files are installed under Unix.

    AddIWADDir("/usr/share/games/doom");
    AddIWADDir("/usr/local/share/games/doom");

#endif

    // Don't run this function again.

    iwad_dirs_built = true;
}

//
// Searches WAD search paths for an WAD with a specific filename.
// 

char *D_FindWADByName(char *name)
{
    char *buf;
    int i;
    boolean exists;
    
    // Absolute path?

    if (M_FileExists(name))
    {
        return name;
    }

    BuildIWADDirList();
    
    // Search through all IWAD paths for a file with the given name.

    for (i=0; i<num_iwad_dirs; ++i)
    {
        // Construct a string for the full path

        buf = malloc(strlen(iwad_dirs[i]) + strlen(name) + 5);
        sprintf(buf, "%s%c%s", iwad_dirs[i], DIR_SEPARATOR, name);

        exists = M_FileExists(buf);

        if (exists)
        {
            return buf;
        }

        free(buf);
    }

    // File not found

    return NULL;
}

//
// D_TryWADByName
//
// Searches for a WAD by its filename, or passes through the filename
// if not found.
//

char *D_TryFindWADByName(char *filename)
{
    char *result;

    result = D_FindWADByName(filename);

    if (result != NULL)
    {
        return result;
    }
    else
    {
        return filename;
    }
}

//
// FindIWAD
// Checks availability of IWAD files by name,
// to determine whether registered/commercial features
// should be executed (notably loading PWADs).
//

char *D_FindIWAD(void)
{
    char *result;
    char *iwadfile;
    int iwadparm;
    int i;

    // Check for the -iwad parameter

    //!
    // Specify an IWAD file to use.
    //
    // @arg <file>
    //

    iwadparm = M_CheckParm("-iwad");

    if (iwadparm)
    {
        // Search through IWAD dirs for an IWAD with the given name.

        iwadfile = myargv[iwadparm + 1];

        result = D_FindWADByName(iwadfile);

        if (result == NULL)
        {
            I_Error("IWAD file '%s' not found!", iwadfile);
        }
        
        IdentifyIWADByName(result);
    }
    else
    {
        // Search through the list and look for an IWAD

        result = NULL;

        BuildIWADDirList();
    
        for (i=0; result == NULL && i<num_iwad_dirs; ++i)
        {
            result = SearchDirectoryForIWAD(iwad_dirs[i]);
        }
    }

    return result;
}

// 
// Get the IWAD name used for savegames.
//

static char *SaveGameIWADName(void)
{
    size_t i;

    // Chex quest hack

    if (gameversion == exe_chex)
    {
        return "chex.wad";
    }

    // Find what subdirectory to use for savegames
    //
    // They should be stored in something like
    //    ~/.chocolate-doom/savegames/doom.wad/
    //
    // The directory depends on the IWAD, so that savegames for
    // different IWADs are kept separate.
    //
    // Note that we match on gamemission rather than on IWAD name.
    // This ensures that doom1.wad and doom.wad saves are stored
    // in the same place.

    for (i=0; i<arrlen(iwads); ++i)
    {
        if (gamemission == iwads[i].mission)
        {
            return iwads[i].name;
        }
    }
    
    return NULL;
}
// 
// SetSaveGameDir
//
// Chooses the directory used to store saved games.
//

void D_SetSaveGameDir(void)
{
    char *iwad_name;

    if (!strcmp(configdir, ""))
    {
        // Use the current directory, just like configdir.

        savegamedir = strdup("");
    }
    else
    {
        // Directory for savegames

        iwad_name = SaveGameIWADName();

        if (iwad_name == NULL) 
        {
            iwad_name = "unknown.wad";
        }

        savegamedir = Z_Malloc(strlen(configdir) + 30, PU_STATIC, 0);
        sprintf(savegamedir, "%ssavegames%c", configdir,
                             DIR_SEPARATOR);

        M_MakeDirectory(savegamedir);

        sprintf(savegamedir + strlen(savegamedir), "%s%c",
                iwad_name, DIR_SEPARATOR);

        M_MakeDirectory(savegamedir);
    }
}

// Strings for dehacked replacements of the startup banner
//
// These are from the original source: some of them are perhaps
// not used in any dehacked patches

static char *banners[] = 
{
    // doom1.wad
    "                            "
    "DOOM Shareware Startup v%i.%i"
    "                           ",
    // doom.wad
    "                            "
    "DOOM Registered Startup v%i.%i"
    "                           ",
    // Registered DOOM uses this
    "                          "
    "DOOM System Startup v%i.%i"
    "                          ",
    // doom.wad (Ultimate DOOM)
    "                         "
    "The Ultimate DOOM Startup v%i.%i"
    "                        ",
    // doom2.wad
    "                         "
    "DOOM 2: Hell on Earth v%i.%i"
    "                           ",
    // tnt.wad
    "                     "
    "DOOM 2: TNT - Evilution v%i.%i"
    "                           ",
    // plutonia.wad
    "                   "
    "DOOM 2: Plutonia Experiment v%i.%i"
    "                           ",
};

//
// Get game name: if the startup banner has been replaced, use that.
// Otherwise, use the name given
// 

static char *GetGameName(char *gamename)
{
    size_t i;
    char *deh_sub;
    
    for (i=0; i<arrlen(banners); ++i)
    {
        // Has the banner been replaced?

        deh_sub = DEH_String(banners[i]);
        
        if (deh_sub != banners[i])
        {
            // Has been replaced
            // We need to expand via printf to include the Doom version 
            // number
            // We also need to cut off spaces to get the basic name

            gamename = Z_Malloc(strlen(deh_sub) + 10, PU_STATIC, 0);
            sprintf(gamename, deh_sub, DOOM_VERSION / 100, DOOM_VERSION % 100);

            while (gamename[0] != '\0' && isspace(gamename[0]))
                strcpy(gamename, gamename+1);

            while (gamename[0] != '\0' && isspace(gamename[strlen(gamename)-1]))
                gamename[strlen(gamename) - 1] = '\0';
            
            return gamename;
        }
    }

    return gamename;
}


//
// Find out what version of Doom is playing.
//

void D_IdentifyVersion(void)
{
    // gamemission is set up by the D_FindIWAD function.  But if 
    // we specify '-iwad', we have to identify using 
    // IdentifyIWADByName.  However, if the iwad does not match
    // any known IWAD name, we may have a dilemma.  Try to 
    // identify by its contents.

    if (gamemission == none)
    {
        unsigned int i;

        for (i=0; i<numlumps; ++i)
        {
            if (!strncasecmp(lumpinfo[i].name, "MAP01", 8))
            {
                gamemission = doom2;
                break;
            } 
            else if (!strncasecmp(lumpinfo[i].name, "E1M1", 8))
            {
                gamemission = doom;
                break;
            }
        }

        if (gamemission == none)
        {
            // Still no idea.  I don't think this is going to work.

            I_Error("Unknown or invalid IWAD file.");
        }
    }

    // Make sure gamemode is set up correctly

    if (gamemission == doom)
    {
        // Doom 1.  But which version?

        if (W_CheckNumForName("E4M1") > 0)
        {
            // Ultimate Doom

            gamemode = retail;
        } 
        else if (W_CheckNumForName("E3M1") > 0)
        {
            gamemode = registered;
        }
        else
        {
            gamemode = shareware;
        }
    }
    else
    {
        // Doom 2 of some kind.

        gamemode = commercial;
    }
}

// Set the gamedescription string

void D_SetGameDescription(void)
{
    gamedescription = "Unknown";

    if (gamemission == doom)
    {
        // Doom 1.  But which version?

        if (gamemode == retail)
        {
            // Ultimate Doom

            gamedescription = GetGameName("The Ultimate DOOM");
        } 
        else if (gamemode == registered)
        {
            gamedescription = GetGameName("DOOM Registered");
        }
        else if (gamemode == shareware)
        {
            gamedescription = GetGameName("DOOM Shareware");
        }
    }
    else
    {
        // Doom 2 of some kind.  But which mission?

        if (gamemission == doom2)
            gamedescription = GetGameName("DOOM 2: Hell on Earth");
        else if (gamemission == pack_plut)
            gamedescription = GetGameName("DOOM 2: Plutonia Experiment"); 
        else if (gamemission == pack_tnt)
            gamedescription = GetGameName("DOOM 2: TNT - Evilution");
    }
}

// Clever hack: Setup can invoke Doom to determine which IWADs are installed.
// Doom searches install paths and exits with the return code being a 
// bitmask of the installed IWAD files.

void D_FindInstalledIWADs(void)
{
    unsigned int i;
    int result;

    BuildIWADDirList();

    result = 0;

    for (i=0; i<arrlen(iwads); ++i)
    {
        if (D_FindWADByName(iwads[i].name) != NULL)
        {
            result |= 1 << i;
        }
    }

    exit(result);
}